Fan attachment for sewing machines



Dec. 22,1925.

G COSTA FAN ATTACHMENT FOR SEWING MACHINES Filed Feb 21. 1924 fiiacomo .5

Patented Dec. 22, 1925.

UNITED STATES GIACOMO COSTA, OF ROCHESTER, NEW YORK.

FAN ATTACHMENT FOB SEWING MACHINES.

Application filed February 21, 1924.

To all whom it may concern:

' Be it known that I, GIACOMO COSTA, a citizen of the United States, residing at. Rochester, in the county of Monroe and State of New York, have invented certain new and useful Improvements in Fan Attachments for Sewing Machines; and I do hereby declare the following to be a full, clear, and exact description of the same, reference being had to the accompanying drawings, forming a part of this specification, and to the reference numerals marked thereon.

My present invention relates to fans and blowers and it has for its object to provide a simple, efficient and convenient fan that may be readily attached to or detached from a sewing machine shaft both for the purpose of cooling the operator and blowing away the lint that collects on the table of the machine. A further object of the invention is to provide a fan of this character that may be attached to different types of sewing machines. To these and other ends the invention resides in certain improvements and combinations of parts all as will be hereinafter more fully described, the novel features being pointed out in the claims at the end of the specification.

In the drawings:

Figure 1 is a fragmentary front view of a sewing machine provided with a fan attachment constructed in accordance with and illustrating one embodiment of my invention;

Figure 2 is an end view thereof;

Fi ure 3 is an enlarged fragmentary View of the hub of the fan partly in section;

Figure 4 is an enlarged fragmentary view of the hub of the fan in elevation;

Figure 5 is an enlarged fragmentary view of the hub of the fan in place on one type of sewing machine, the hub being shown in central section and V Figure 6 is a view similar to Figure 5 but showing the hub attached to another type of sewing machine.

Similar reference numerals throughout the several views indicate the same parts.

Referring first to Figures 1 and2, 1 indicates the head and 2 the table of a sewing machine. Carried on the shaft thereof (not shown) is the usual pulley 3 for the belt 4 Serial No. 694,197.

and a fly wheel 5 on the outer side thereof held in place by a nut 6 having a shouldered or enlarged knurled head 7.

The fan of my invention embodies a flat circular hub plate 8 that may be conveniently stamped from sheet metal. Secured to the front side thereof is a thin plate or spider 9 (Figure 5) fastened in the present instance by rivets 10. The fan blades 11 are preferably formed integrally with the plate 9, are four in number in the present instance and are offset from the planes ofthe plates 9 and 10 to an outward plane by means of inclined neck portions 11. They of course have the usual pitch of a fan or blower.

On the rear of the hub plate 8 and struck from the edges thereof is a pair of oppositely arranged clips 12 that are hook shaped, their ends being turned inwardly at 13. These clips are also converging though substantially tangent to the hub.

The fan is applied to the shaft of the machine by engaging the clips 12 over the head 7 of the nut 6 in the manner shown in Figures 1 and 5. The clips jam upon the periphery of the head in substantially diametrical contact and jam themselves to a secure position, the ends or lips 13 engaging in rear of the head. They may nevertheless be dislodged by tapping them in reverse direction.

The above is the construction and mode of operation in attaching the fan to a domestic type of machine which is provided with the nut 6. There is another type of commercial machine that does not employ the nut 6 a detail of which machine is shown in Figure 6. In this machine a hub 14 on fly wheel 5 is secured to shaft 15 by a shouldered screw 16 and a washer 17. I provide the fan hub 8 with a central aperture 18 which takes the screw 16 and secures the fan to the shaft without utilizing the clips 12 which clear the hub 14.

I claim as my invention:

1. A fan attachment for sewing machines embodying a flat central hub plate and fan blades attached thereto said hub plate being provided with opposite laterally arranged converging clips extending axially and thence inwardly and adapted to jam upon the head of the nut on the sewing ma chine shaft through an applying movement transverse to said shaft.

2. A fan attachment for sewing machines embodying a flat central hub plate and an I blades attached thereto said hub plate being provided with opposite laterall 7 arranged converging clips extending axially and thence inwardly and adapted to jam upon the head of the nut on the sewing machine shaft through an applying movement transverse to said shaft, and being "further provided with a central aperture to receive the shouldered screw of a sewing machine shaft.

GIAOQMO COSTr. 

